US2021177544A1PendingUtilityA1
Dental prosthesis
Est. expiryAug 14, 2038(~12 yrs left)· nominal 20-yr term from priority
Inventors:Markus Vollmann
A61C 13/0022A61K 6/833A61C 5/73
52
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Claims
Abstract
The present invention is related to a dental prosthesis, in particular a crown, consisting of or comprising an inner primary part, such as a cap, which is joined in a fixed manner to an outer secondary part.Further, the present invention is also directed to a dental kit for manufacturing or producing such a dental prosthesis, in particular a crown.
Claims
exact text as granted — not AI-modified1 . A dental prosthesis, comprising an inner primary part, which is joined in a fixed manner to an outer secondary part,
wherein the inner primary part includes plastic material, and the outer secondary part includes ceramic material, and wherein the plastic material has a modulus of elasticity E P and the ceramic material has a modulus of elasticity E S where E P <E S ; wherein the modulus of elasticity E P of the inner primary part is 5 GPa≤E P ≤30 GPa, and/or the modulus of elasticity E S of the outer secondary part is 40 GPa≤E S ≤120 GPa; wherein the inner primary part includes at least one material being selected from the group consisting of PMMA (polymethyl methacrylate), PEEK (polyether ether ketone), TEGDMA (triethylene glycol dimethacrylate), DEGMA (diethylene glycol dimethacrylate), UDMA (urethane dimethacrylate) and a combination or part-combination thereof; and wherein the outer secondary part includes a material being selected from the group consisting of zirconium dioxide, aluminum oxide, feldspar, lithium silicate glass ceramic or mixtures and part-mixtures thereof.
2 . The dental prosthesis according to claim 1 , wherein the modulus of elasticity E P of the inner primary part is 10 GPa≤E P ≤25 GPa, and/or the modulus of elasticity E S of the outer secondary part is 50 GPa≤E S ≤75 GPa.
3 . The dental prosthesis according to claim 1 , wherein the inner primary part includes at least one material to which a ceramic-based fill material being selected from the group consisting of SiO 2 , feldspar and zirconium dioxide has been additionally added.
4 . The dental prosthesis according to claim 1 , wherein the inner primary part has a skeleton structure infiltrated with at least one polymer, said structure includes a ceramic material.
5 . The dental prosthesis according to claim 1 , wherein the inner primary part is connected to the outer secondary part by bonding with adhesive or by cementing.
6 . The dental prosthesis according to claim 1 , wherein the outer secondary part includes a starting material with the following composition in % by weight:
SiO 2
46.0-72.0
Li 2 O
10.0-25.0
ZrO 2
8.0-20.0
Al 2 O 3
0.1-8.0
K 2 O
0.1-5.0
CeO 2
0.0-4.0
B 2 O 3
0.0-4.0
Na 2 O
0.0-4.0
Tb 4 O 7
0.0-2.5
at least one nucleating agent 1.0-10.0,
0.0 to 4.0 of at least one additive,
where the entire sum is 100% by weight.
7 . The dental prosthesis according to claim 1 , wherein the outer secondary part includes a starting material with the following composition in % by weight
SiO 2
58-60
Li 2 O
13.5-20.5
ZrO 2
9.0-12.5
P 2 O 5
3.0-7.5
Al 2 O 3
0.5-6.0
K 2 O
0.5-3.5
CeO 2
0.5-2.5
B 2 O 3
0-3
Na 2 O
0-3
Tb 4 O 7
0-1.5.
8 . A dental kit for manufacturing or producing a dental prosthesis, comprising an inner primary part, which is joined in a fixed manner to an outer secondary part, wherein the dental kit comprises:
a) a first block for forming, an inner primary part, wherein the first block includes plastic material, where the plastic material of the first block has a modulus of elasticity Ep; b) a second block for forming, an outer secondary part, wherein the second block includes ceramic material, where the ceramic material of the second block has a modulus of elasticity Es where Ep<Es; and c) optionally, one or more adhesive bonding agents suitable for joining the inner primary part in a fixed manner to the outer secondary part; wherein the modulus of elasticity E P of the plastic material of the first block is 5 GPa≤E P ≤30 GPa, and/or the modulus of elasticity E S of the ceramic material of the second block is 40 GPa≤E S ≤120 GPa; wherein the first block includes at least one material being selected from the group consisting of PMMA (polymethyl methacrylate), PEEK (polyether ether ketone), TEGDMA (triethylene glycol dimethacrylate), DEGMA (diethylene glycol dimethacrylate), UDMA (urethane dimethacrylate) and a combination or part-combination thereof; and wherein the outer secondary part includes a material being selected from the group consisting of zirconium dioxide, aluminum oxide, feldspar, lithium silicate glass ceramic and mixtures or part-mixtures thereof.
9 . The dental kit according to claim 8 , wherein the modulus of elasticity E P of the plastic material of the first block is 10 GPa≤E P ≤25 GPa, and/or the modulus of elasticity E S of the ceramic material of the second block is 50 GPa≤E S ≤75 GPa.
10 . The dental kit according to claim 8 , wherein the first block includes at least one material to which a ceramic-based fill material being selected from the group consisting of SiO 2 , feldspar and zirconium dioxide has been additionally added.
11 . The dental kit according to claim 8 , wherein the second block includes a starting material with the following composition in % by weight:
SiO 2
46.0-72.0
Li 2 O
10.0-25.0
ZrO 2
8.0-20.0
Al 2 O 3
0.1-8.0
K 2 O
0.1-5.0
CeO 2
0.0-4.0
B 2 O 3
0.0-4.0
Na 2 O
0.0-4.0
Tb 4 O 7
0.0-2.5
at least one nucleating agent 1.0-10.0,
0.0 to 4.0 of at least one additive,
where the entire sum is 100% by weight.
12 . The dental kit according to claim 8 , wherein the second block includes a starting material with the following composition in % by weight:
SiO 2
58-60
Li 2 O
13.5-20.5
ZrO 2
9.0-12.5
P 2 O 5
3.0-7.5
Al 2 O 3
0.5-6.0
K 2 O
0.5-3.5
CeO 2
0.5-2.5
B 2 O 3
0-3
Na 2 O
0-3
Tb 4 O 7
0-1.5.
13 . The dental prosthesis according to claim 5 , wherein the adhesive material includes at least one material being selected from the group consisting of dental polymer-based adhesives.
14 . The dental prosthesis according to claim 6 , wherein at least one nucleating agent is P 2 O 5 .
15 . The dental kit according to claim 8 , further comprising one or more adhesive bonding agents suitable for joining the inner primary part in a fixed manner to the outer secondary part.
16 . The dental prosthesis according to claim 11 , wherein at least one nucleating agent is P 2 O 5 .Join the waitlist — get patent alerts
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